//Alleen nummerieke waarden in een input box
function getKeyCode(eventObject) {
	if (!eventObject) keyCode = window.event.keyCode; //IE
	else keyCode = eventObject.which; //Mozilla
	return keyCode;
}

 

function onlyNumeric(eventObject) {
	keyCode = getKeyCode(eventObject);
	if (((keyCode > 31) && (keyCode < 48)) || ((keyCode > 57) && (keyCode < 127)))
		{
		if (!eventObject) window.event.keyCode = 0; //IE
		else eventObject.preventDefault(); //Mozilla
		return false;
		}
	}

//EINDE